title: Investigation of mental disorders in Beijing suburban district.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002681:China; D005260:Female; D006801:Humans; D008297:Male; D001523:Mental Disorders / Q000453:epidemiology*; D008875:Middle Aged; D012559:Schizophrenia / Q000453:epidemiology / Q000628:therapy; D012737:Sex Factors